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DNS and bind --------------- DNS: Domain Name System 1. Development of DNS DNS works at the application layer and listens to UDP and TCP ports 53 at the same time. UDP response query request TCP response The/etc/directory in each system contains a hosts file, which implements the most direct configuration of the DNS server. At the beginning, there was a corresponding relationship between the

1. What is DNSDNS: Domain Name Service, which is a hierarchical computer and network Service naming system that implements name resolution (HOSTNAMEDNS uses the C/s architecture, and the service listens on port 53rd of the host's tcp/udp. Transport Layer protocol UDP is used for domain name resolution, TCP for zone transferLocal name resolution file: Hosts (host

1, get at []to take care of;Cases:We want to get on the truth. Who killed him? And why?We want to find out the truth. Who killed him? Why?2, take advantage ofUseTake advantage of: taking advantage while3, managing [' M?n?d???]V. Management; try to deal with (manage's ing form)Adj, managed, saved, and nosyManaging: Managing the Executive management process4, incorporate [? n ' k?? P?RE?T]Vt. To contain, absorb, or embody; Merge VI. Adj, merger, composi

Because we often want to separate static files from dynamic files during website creation, for example, we want to put the static pages of the help pages under some folders instead of projects, at the same time, some people want to implement pseudo-static functions,Next I will introduce the configuration of combining Tomcat and Apache to achieve pseudo-static, static and dynamic file separation: 1. Install tomcat6.0 and tomcat5.5. After installation,

.OpenfireServer Configuration Enter in the address bar of the browserHttp: // localhost: 9090/You can start configuring the Instant Messaging Server. (1)Language selection: Simplified Chinese (2)Server Settings: select the domain and port. We recommend that you use the default value. (3)Database settings: Select "Standard Database" (4)Standard Da

This article is not original. Click to view the original post Many programs can implement persistent connections through sockets to push messages in real time. However, http requests are usually short connections. Once a request ends, the connection to the server will be closed,The server cannot actively push data to the client, but can only initiate requests from the client. However, in some cases, real-time message transmission needs to be implemented on the web, such as

Label:After performing your first instant recovery (pitr,point-in-time-recovery), we are ready to work on a real replication setup. In this chapter, you will learn how to set up asynchronous replication and flow. Our goal is to ensure that you can achieve higher availability and higher data security. In this chapter, we will discuss the following topics: • Configuring asynchronous replication • Understanding Flow • Merge streams and Archives • Manage

domain name (a VTP domain name). vswitches in the same management domain can learn VTP information from each other through the VTP protocol.Cat5001> (enable) sho vtp domainDomain Name Domain Index VTP Version Local Mode------------------------------------------------------------------

themselves can access these instance domains.Therefore, it is highly discouraged to use the public tag instance domain, which destroys encapsulation.3.1 About constructorsFrom the above program can be seen(1) The constructor has the same name as the class(2) Each class can have more than one constructor(3) constructors can have 0, 1, or more parameters(3) The co

1. IIS Authentication overview... 3 1. Anonymous Access... 3 2. Integrated windows Authentication... 3 2.1. NTLM verification... 3 2.2. Kerberos verification... 3 3. Basic Authentication... 4 2. Anonymous Access... 4 Iii. Windows integration verification... 5 1. NTLM verification process... 5 1.1. The client selects the NTLM method... 5 1.2. The server returns th